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首页> 外文期刊>Journal of Environmental Science and Health >Oxidation of propyl paraben by ferrate(Ⅵ): Kinetics, products, and toxicity assessment
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Oxidation of propyl paraben by ferrate(Ⅵ): Kinetics, products, and toxicity assessment

机译：高铁酸盐氧化对羟基苯甲酸丙酯（Ⅵ）：动力学，产物和毒性评估

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摘要

Propyl paraben (propyl 4-hydroxybenzoate, PPB), one of the typically used paraben species in various pharmaceutical and personal care products, has been found in different aquatic environment, which could affect the water quality and human health. In this paper, the degradation of PPB by aqueous ferrate (Fe(VI)) was investigated in different water matrix and reaction kinetics as a function of pH was determined. Intermediate products of the degradation process were isolated and characterized by the high performance liquid chromatography/mass spectrometry/mass spectrometry techniques. Acute and chronic toxicities during water treatment of PPB using Fe(VI) were calculated using the ECOSAR program at three trophic levels. The obtained apparent second-order rate constant (k(app)) for PPB reaction with Fe(VI) ranged from 99.6 +/- 0.4M(-1) s(-1) to 15.0 +/- 0.1M(-1) s(-1) with the half-life (t(1/2)) ranging from 154s to 1026s at pH 6.5-10.0 for an Fe(VI) concentration of 600M. The proposed pathway for the oxidation of PPB by Fe(VI) involves one electron transfer of phenoxyl radical and breaking of the ether bond. In general, the oxidation of PPB by ferrate resulted in a significant decrease in toxicity at three trophic levels.
机译：对羟基苯甲酸丙酯（4-羟基苯甲酸丙酯，PPB）是各种药物和个人护理产品中常用的对羟基苯甲酸酯种类之一，已在不同的水生环境中发现，这可能会影响水质和人类健康。在本文中，研究了在不同的水基质中高铁酸盐（Fe（VI））对PPB的降解，并确定了反应动力学随pH的变化。通过高效液相色谱/质谱/质谱技术对降解过程的中间产物进行分离和表征。使用ECOSAR程序在三个营养级计算了使用Fe（VI）处理PPB的水处理期间的急性和慢性毒性。 PPB与Fe（VI）反应获得的表观二阶速率常数（k（app））为99.6 +/- 0.4M（-1）s（-1）至15.0 +/- 0.1M（-1） s（-1）的Fe（VI）浓度为600M时，其半衰期（t（1/2））在pH值为6.5-10.0时范围为154s至1026s。 Fe（VI）氧化PPB的拟议途径涉及苯氧基自由基的一个电子转移和醚键的断裂。通常，高铁酸盐对PPB的氧化导致在三个营养级的毒性显着降低。

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  • 来源
    《Journal of Environmental Science and Health》 |2018年第10期|873-882|共10页
  • 作者

    An Jibin; Xia Chunqiu; He Jiahong; Feng Huixia;

  • 作者单位

    Chongqing Univ Arts & Sci, Chongqing Key Lab Environm Mat & Remediat Technol, Chongqing, Peoples R China;

    Chongqing Univ Arts & Sci, Chongqing Key Lab Environm Mat & Remediat Technol, Chongqing, Peoples R China;

    Chongqing Univ Arts & Sci, Chongqing Key Lab Environm Mat & Remediat Technol, Chongqing, Peoples R China;

    Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou, Gansu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Propyl paraben; ferrate(VI); degradation; kinetics; toxicity;

    机译：对羟基苯甲酸丙酯;高铁酸盐（VI）;降解;动力学;毒性;

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